/*
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package javademo.swing.slide;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.util.Hashtable;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/*
* SliderDemo2.java requires all the files in the images/doggy
* directory.
*/
@SuppressWarnings("serial")
public class SliderDemo2 extends JPanel implements ActionListener, WindowListener, ChangeListener
{
// Set up animation parameters.
static final int FPS_MIN = 0;
static final int FPS_MAX = 30;
static final int FPS_INIT = 15; // initial frames per second
int frameNumber = 0;
int NUM_FRAMES = 14;
ImageIcon[] images = new ImageIcon[NUM_FRAMES];
int delay;
Timer timer;
boolean frozen = false;
// This label uses ImageIcon to show the doggy pictures.
JLabel picture;
public SliderDemo2()
{
super(new BorderLayout());
delay = 1000 / FPS_INIT;
// Create the slider.
JSlider framesPerSecond = new JSlider(JSlider.VERTICAL, FPS_MIN, FPS_MAX, FPS_INIT);
framesPerSecond.addChangeListener(this);
framesPerSecond.setMajorTickSpacing(10);
framesPerSecond.setPaintTicks(true);
// Create the label table.
Hashtable<Integer, JLabel> labelTable = new Hashtable<Integer, JLabel>();
// PENDING: could use images, but we don't have any good ones.
labelTable.put(new Integer(0), new JLabel("Stop"));
// new JLabel(createImageIcon("images/stop.gif")) );
labelTable.put(new Integer(FPS_MAX / 10), new JLabel("Slow"));
// new JLabel(createImageIcon("images/slow.gif")) );
labelTable.put(new Integer(FPS_MAX), new JLabel("Fast"));
// new JLabel(createImageIcon("images/fast.gif")) );
framesPerSecond.setLabelTable(labelTable);
framesPerSecond.setPaintLabels(true);
framesPerSecond.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 10));
// Create the label that displays the animation.
picture = new JLabel();
picture.setHorizontalAlignment(JLabel.CENTER);
picture.setAlignmentX(Component.CENTER_ALIGNMENT);
picture.setBorder(BorderFactory.createCompoundBorder(BorderFactory.createLoweredBevelBorder(),
BorderFactory.createEmptyBorder(10, 10, 10, 10)));
updatePicture(0); // display first frame
// Put everything together.
add(framesPerSecond, BorderLayout.LINE_START);
add(picture, BorderLayout.CENTER);
setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
// Set up a timer that calls this object's action handler.
timer = new Timer(delay, this);
timer.setInitialDelay(delay * 7); // We pause animation twice per cycle
// by restarting the timer
timer.setCoalesce(true);
}
/** Add a listener for window events. */
void addWindowListener(Window w)
{
w.addWindowListener(this);
}
// React to window events.
public void windowIconified(WindowEvent e)
{
stopAnimation();
}
public void windowDeiconified(WindowEvent e)
{
startAnimation();
}
public void windowOpened(WindowEvent e)
{
}
public void windowClosing(WindowEvent e)
{
}
public void windowClosed(WindowEvent e)
{
}
public void windowActivated(WindowEvent e)
{
}
public void windowDeactivated(WindowEvent e)
{
}
/** Listen to the slider. */
public void stateChanged(ChangeEvent e)
{
JSlider source = (JSlider)e.getSource();
if (!source.getValueIsAdjusting())
{
int fps = (int)source.getValue();
if (fps == 0)
{
if (!frozen)
stopAnimation();
}
else
{
delay = 1000 / fps;
timer.setDelay(delay);
timer.setInitialDelay(delay * 10);
if (frozen)
startAnimation();
}
}
}
public void startAnimation()
{
// Start (or restart) animating!
timer.start();
frozen = false;
}
public void stopAnimation()
{
// Stop the animating thread.
timer.stop();
frozen = true;
}
// Called when the Timer fires.
public void actionPerformed(ActionEvent e)
{
// Advance the animation frame.
if (frameNumber == (NUM_FRAMES - 1))
{
frameNumber = 0;
}
else
{
frameNumber++;
}
updatePicture(frameNumber); // display the next picture
if (frameNumber == (NUM_FRAMES - 1) || frameNumber == (NUM_FRAMES / 2 - 1))
{
timer.restart();
}
}
/** Update the label to display the image for the current frame. */
protected void updatePicture(int frameNum)
{
// Get the image if we haven't already.
if (images[frameNumber] == null)
{
images[frameNumber] = createImageIcon("images/doggy/T" + frameNumber + ".gif");
}
// Set the image.
if (images[frameNumber] != null)
{
picture.setIcon(images[frameNumber]);
}
else
{ // image not found
picture.setText("image #" + frameNumber + " not found");
}
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path)
{
java.net.URL imgURL = SliderDemo2.class.getResource(path);
if (imgURL != null)
{
return new ImageIcon(imgURL);
}
else
{
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI()
{
// Create and set up the window.
JFrame frame = new JFrame("SliderDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
SliderDemo2 animator = new SliderDemo2();
// Add content to the window.
frame.add(animator, BorderLayout.CENTER);
// Display the window.
frame.pack();
frame.setVisible(true);
animator.startAnimation();
}
public static void main(String[] args)
{
/* Turn off metal's use of bold fonts */
UIManager.put("swing.boldMetal", Boolean.FALSE);
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}
}